1510s, chiefly Scottish, originally "contrary to the course of the sun or a clock" (movement in this direction being considered unlucky), probably from Middle Low German weddersinnes, literally "against the way" (i.e. "in the opposite direction"), from widersinnen "to go against," from wider "against" (see with) + sinnen "to travel, go," from Old High German sinnen, related to sind "journey" (see send).